1 files changed, 55 insertions, 0 deletions
diff --git a/otautil/SysUtil.h b/otautil/SysUtil.h
new file mode 100644
index 000000000..6a79bf31f
--- /dev/null
+++ b/otautil/SysUtil.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _OTAUTIL_SYSUTIL
+#define _OTAUTIL_SYSUTIL
+
+#include <sys/types.h>
+
+#include <vector>
+
+struct MappedRange {
+  void* addr;
+  size_t length;
+};
+
+/*
+ * Use this to keep track of mapped segments.
+ */
+struct MemMapping {
+  unsigned char* addr; /* start of data */
+  size_t length;       /* length of data */
+
+  std::vector<MappedRange> ranges;
+};
+
+/*
+ * Map a file into a private, read-only memory segment.  If 'fn'
+ * begins with an '@' character, it is a map of blocks to be mapped,
+ * otherwise it is treated as an ordinary file.
+ *
+ * On success, "pMap" is filled in, and zero is returned.
+ */
+int sysMapFile(const char* fn, MemMapping* pMap);
+
+/*
+ * Release the pages associated with a shared memory segment.
+ *
+ * This does not free "pMap"; it just releases the memory.
+ */
+void sysReleaseMap(MemMapping* pMap);
+
+#endif  // _OTAUTIL_SYSUTIL